1. Studio Dermatologico Veterinario; Via G. Sismondi 62 20133 Milan Italy
2. IDEXX Laboratories; Moerikestrasse 28/3 71636 Ludwigsburg Germany
3. Department of Veterinary Science and Public Health; Università degli studi di Milano; Via Celoria 10 20133 Milan Italy
4. Istituto Veterinario di Novara; Strada Provinciale 9 28060 Granozzo con Monticello NO Italy
5. Clinic for Small Animal Internal Medicine; Vetsuisse Faculty; University of Zurich; Winterthurerstrasse 260 8057 Zurich Switzerland
6. Department of Animal Medicine, Production and Health; Università degli Studi di Padova; Viale dell'Università 16 35020 Legnaro PD Italy
7. Friedrich-Loeffler-Institut (FLI); Federal Research Institute for Animal Health; Institute of Epidemiology; 17493 Greifswald-Insel Riems Germany